jdbc连接步骤（以oracle为例）：

1，加载驱动

Class.forName("oracle.jdbc.driver.OracleDriver");

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2, 建立连接

Connection cn = DriverManager.getConnection("jdbc:oracle:thin:@10.49.0.6:1521:orcl", "tvcms_dev", "tvcms_dev");

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3, 建立 statement

Statement st = cn.createStatement();

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4, 执行 sql,获得结果集

ResultSet rs = st.excuteQuery(sql);

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5, 处理结果集

while(rs.next()){

?rs.getObject("字段名")

}

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6, 关闭资源

finally{

?rs = null;

?st?= null;

?cn = null;

}

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-------------连接大全-----------

一、DB2?

Class.forName("Com.ibm.db2.jdbc.net.DB2Driver");?

String url="jdbc:db2://dburl:port/DBname"?

cn = DriverManager.getConnection( url, sUsr, sPwd );

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二、Microsoft SQLServer(microsoft)?

Class.forName( "com.microsoft.jdbc.sqlserver.SQLServerDriver" );?

cn = DriverManager.getConnection( "jdbc:microsoft:sqlserver://DBServerIP:1433;databaseName=master", sUsr, sPwd );?

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三、Sybase(jconn2.jar)

Class.forName( "com.sybase.jdbc2.jdbc.SybDriver" );?

cn = DriverManager.getConnection( "jdbc:sybase:Tds:DBServerIP:2638", sUsr, sPwd );?

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四、MySQL(mm.mysql-3.0.2-bin.jar)

Class.forName( "org.gjt.mm.mysql.Driver" );?

cn = DriverManager.getConnection( "jdbc:mysql://DBServerIP:3306/myDatabaseName", sUsr, sPwd );?

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五、PostgreSQL(pgjdbc2.jar)

Class.forName( "org.postgresql.Driver" );?

cn = DriverManager.getConnection( "jdbc:postgresql://DBServerIP/myDatabaseName", sUsr, sPwd );?

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六、Oracle(classes12.jar)?

Class.forName( "oracle.jdbc.driver.OracleDriver" );?

cn = DriverManager.getConnection( "jdbc:oracle:thin:@MyDbComputerNameOrIP:1521:ORCL", sUsr, sPwd );?